HRB bearing | transmission roller bearing inner ring out the reason and solution

There is rotational, have HRB bearing ( ) Jiaxing bearing group sales co. , LTD. ( The company) Is bearing group co. , LTD. Established in jiaxing spot sales window, specializing in HRB brand bearings, facing the whole country, the existing stock 50 million yuan, covers the whole bearing, have very strong spot supply, is the group's retail sales center. Auto transmission, most of the traditional system of the rotating shaft by rolling bearing support, and to guarantee the stability of the rotation of the rotating shaft, here is the cylindrical roller bearing support the rotating shaft drive, in use process, found that the phenomenon of cylindrical roller bearing inner ring came out. The cause of cylindrical roller bearing inner ring out? How to solve for the best solution? Here the author according to the understanding of the bearings of knowledge, to share the related content. A, cylindrical roller bearing inner ring out fault phenomenon and influence the failure parts from the whole down in the inspection, found that active axle of cylindrical roller bearing inner ring out by private plane position 3 mm. If the cylindrical roller bearing inner ring out a certain distance, roller and bearing inner ring raceway surface not full length contact, can appear under the load bearing abnormal vibration, the vibration will directly affect the gearbox running the whole case, adverse noise, thus affect the normal use. Second, cylindrical roller bearing inner ring out the cause of the problem analysis, system structure analysis: 1 according to the structure design, the ends of the active axle bearing, fixed end use deep groove ball bearings, free end USES the cylindrical roller bearing. Deep groove ball bearing caused by the radial steel belt and spindle hydraulic axial force. Cylindrical roller bearing is only from the wheel and axle passed steel belt tension, no axial force applied to the bearing, the cylindrical roller bearing was not influenced by the axial force to make it out. 2, cause analysis: from the mechanical principle, two interference fit parts appeared out of the use process, either parts manufacturing ultra poor, reduce fastening force is insufficient, or is the design with the interference of small make fastening force is insufficient, part work of thrust is greater than the binding force, so that the parts loose move off. Bearing the emergence reason based on the idea of exploring. 1) Ruler is unqualified, size detection: if parts has lead to risk of bearing inner ring out. Bearing assemblies of two prototype measurement, shown in the result, the size comply with the design requirements, can be ruled out the impact factors. 2) Binding force calculation: bearing inner ring and the shaft is interference fit, the cause of the inner ring out may be enough for the design of interference. Check the size of the shaft and bearing design, found between the two under the limit state of the minimum interference quantity to zero. 002mm。 3) Reason to confirm according to the above analysis shows that under the influence of the strip tension, not simply does not exist between shaft and roller bearing axial force, plus product manufacturing and assembly error, the axial force increases. When the shaft stress and manufacturing operation error caused by the axial force sum greater than bearing, the combination of fastening force bearing will happen in the original location on the axle sliding. Shaft deformation of axial force of numerical calculation is complicated, here is not for concrete calculation is derived. From the results of CAE analysis have active shaft cone flange bearing level 0. 084 mm deformation is not too small, axial force bearing and shaft of the minimum interference quantity in combination with 23 fastening force. 73 n compared with must slim. Thus, can confirm that this CVT product active axle in bench test of cylindrical roller bearing inner ring out the cause of the problem, component design is given enough bearing and shaft with interference, has no bearing on the shaft and the structural design of the limit of the structure. Three solutions for the above confirmed that the two aspects of reasons, develop the two measures to solve the problem: a) Increase of the bearing inner ring and the shaft. Adjust the shaft diameter tolerance of bearing fit place, will minimize the wheel and the cylindrical roller bearing with interference quantity by 0. 002 mm up to 0. 011mm。 b) The bearing inner ring increase a limit resistance structure. On the wheel and axle bearing with lateral position to add a ring groove, mount retaining ring, to limit the bearing inner ring, prevent inner ring out. If you are interested in the above HRB bearing the author introduces the information or have any questions, please click on the website on the right side of the online customer service or call:, you close the way of jiaxing bearing purchasing advisors. - - - - - - Editor: jiaxing bearing sourcing consultant LTD. All rights reserved, The company) Reprint please indicate the source